Re: XF 70-300 + 1.4x TC vs XF 100-400 on 40MP bodies (X-T5/X-H2)
I've used the 70-300/1.4x combo a few times on my X-T5 with mixed results. Focus wasn't bad, but green/purple fringing was quite pronounced wide open when shooting light colored subjects (like great egrets) with some back-lighting, and fine details were not well resolved. But that's a hard ask for any lens. Better results at f9-11.
So it can work OK in a pinch with good light and careful post-processing, but I'd be more confident with a 100-400 or 150-600 for regular tele work. Can't beat the convenience and weight for the reach, though.
Here's an example that's heavily cropped but came out ok.
Re: XF 70-300 + 1.4x TC vs XF 100-400 on 40MP bodies (X-T5/X-H2)
I've used the 70-300/1.4x combo a few times on my X-T5 with mixed results. Focus wasn't bad, but green/purple fringing was quite pronounced wide open when shooting light colored subjects (like great egrets) with some back-lighting, and fine details were not well resolved. But that's a hard ask for any lens. Better results at f9-11.
So it can work OK in a pinch with good light and careful post-processing, but I'd be more confident with a 100-400 or 150-600 for regular tele work. Can't beat the convenience and weight for the reach, though.
Here's an example that's heavily cropped but came out ok.
May 05, 2026 at 07:49 AM
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